Maximizing Performance with Nutrition: PDF OnlyNutritional concerns need for ironHAYMES, EMILY M. Author Information Department of Movement Science and Physical Education, Florida State University, Tallahassee, FL 32306 Medicine & Science in Sports & Exercise: October 1987 - Volume 19 - Issue 5 - p S197-S200 Free Abstract HAYMES, E. M. Nutritional concerns: need for iron. Med. Sci. Sports Exerc., Vol. 19, No. 5 (Supplement), pp. S197–S200, 1987. Depletion of iron stores is frequently seen in male and female distance runners. Possible causes of this iron depletion include inadequate iron intake especially among females and increased iron excretion through sweating and gastrointestinal blood loss. Animal studies suggest that iron deficiency without anemia can reduce endurance by lowering tissue cytochromes and the activity of certain muscle tissue enzymes. Iron supplementation appears to be beneficial in reducing blood lactate concentrations following heavy exercise. The amount of iron in the supplement appears to influence the amount of increase in hemoglobin and serum ferritin. © Williams & Wilkins 1987. All Rights Reserved.